It's not the compressor that's the issue, it's the bubble size that you are producing. Regular air diffusers have very, very small slits or holes in them 1,000's of holes in order to get that good left of the water. The bubbles your producing are more than likely way to big and not helping a hole lot?? Lets see what someone else has to say though. I am no expert by any means so hold tight for another answer as well.

RC

The only difference between a rut and a Grave is the depth. So get up get out of that rut and get moving!! Time to work!!